An angle iron constructed of grade 347 stainless steel is called an SS 347 angle. This type of stainless steel stands out due to its superior ability to withstand high temperatures and intergranular corrosion. In structural applications, the L shaped cross section that gives support and strength to different constructions and frameworks is frequently referred to as the "angle" in SS 347 angle. Like grade 304 stainless steel, grade 347 includes tantalum and niobium, formerly columbium. These components help it resist chromium carbide precipitation, which can cause corrosion in certain stainless steels when exposed to higher temperatures. They also help it maintain a stable, austenitic structure. Because of this, SS 347 is especially well suited for high temperature applications, including heat exchangers, chemical processing equipment, and engine and exhaust parts in the aerospace and automotive industries.

SS 347 angle is commonly used in environments where resistance to corrosion and stability at high temperatures are essential. Its ability to withstand high temperatures and oxidative conditions in the aerospace industry makes it a highly favoured material for engine parts and exhaust systems. Because of this, it is ideal for demanding applications where material failure is not an option. SS 347 is also used in heat exchangers, industrial boiler and furnace components, and chemical processing equipment. Its capacity to withstand intergranular corrosion also contributes to its popularity in the power generation and oil refining industries, where corrosive conditions and heat stress must be tolerated.

SS 347 angle is highly favored for high temperature applications due to its excellent resistance to corrosion and its ability to withstand extreme heat without compromising strength. Additionally, its enhanced weldability makes it suitable for use in industries such as aerospace and chemical processing.